dfc: port the latest fixes

Port the latest fixes from msm-4.19. This includes:
- Clear status flags when entering powersave (Ifc6457f1696ef)
- Adjust QMAP query grants (I9da42a9d2425)
- fix use-after-free (I76ab4a99b3f4)

Change-Id: I1beb93d1f6fdf214c8756bd0e488914bf876aa5e
Acked-by: Weiyi Chen <weiyic@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>